Most people, even proprietary closed source developers, write software where one of the first sentences in its license is something like "This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
That is inexpensive.
Some people, myself included, develop software where the fitness for purpose is guaranteed and warranties are explicit and absolute.
That is very expensive. And slow.
It makes sense to stick with ancient and niche platforms that have been pored over for 30-40 years by very slow and deliberate developers when someone may die, the environment may be ruined, or millions of dollars in damage may occur if something breaks.
At least that's what I tell myself when staring at Ada on INTEGRITY on PowerPC.